Create KernelSsaBuilder from KernelSsaBuilderTask

pkg/compiler/lib/src/kernel/kernel_strategy.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.kernel.frontend_strategy;
 
 import '../closure.dart';
 import '../backend_strategy.dart';
 import '../common.dart';
 import '../common_elements.dart';
@@ skipping 13 matching lines @@
 import '../js_backend/backend.dart';
 import '../js_backend/backend_usage.dart';
 import '../js_backend/custom_elements_analysis.dart';
 import '../js_backend/interceptor_data.dart';
 import '../js_backend/mirrors_analysis.dart';
 import '../js_backend/mirrors_data.dart';
 import '../js_backend/native_data.dart';
 import '../js_backend/no_such_method_registry.dart';
 import '../js_backend/runtime_types.dart';
 import '../js_emitter/sorter.dart';
+import '../kernel/element_map.dart';
 import '../library_loader.dart';
 import '../native/resolver.dart';
 import '../serialization/task.dart';
 import '../ssa/builder_kernel.dart';
+import '../ssa/nodes.dart';
 import '../ssa/ssa.dart';
 import '../patch_parser.dart';
 import '../resolved_uri_translator.dart';
 import '../universe/world_builder.dart';
 import '../universe/world_impact.dart';
 import '../world.dart';
 import 'element_map_impl.dart';
 
 /// Front end strategy that loads '.dill' files and builds a resolved element
 /// model from kernel IR nodes.
@@ skipping 228 matching lines @@
       NativeBasicData nativeBasicData,
       ClosedWorld closedWorld,
       SelectorConstraintsStrategy selectorConstraintsStrategy) {
     return new KernelCodegenWorldBuilder(_compiler.elementEnvironment,
         nativeBasicData, closedWorld, selectorConstraintsStrategy);
   }
 
   @override
   SsaBuilderTask createSsaBuilderTask(JavaScriptBackend backend,
       SourceInformationStrategy sourceInformationStrategy) {
-    return new KernelSsaBuilderTask(backend.compiler.measurer);
+    return new KernelSsaBuilderTask(backend.compiler);
   }
 }
 
 class MirrorsCodegenAnalysisImpl implements MirrorsCodegenAnalysis {
   @override
   int get preMirrorsMethodCount {
     throw new UnimplementedError(
         'MirrorsCodegenAnalysisImpl.preMirrorsMethodCount');
   }
 
@@ skipping 22 matching lines @@
   final CodegenRegistry registry;
 
   KernelCodegenWorkItem(this._backend, this._closedWorld, this.element)
       : registry = new CodegenRegistry(element);
 
   @override
   WorldImpact run() {
     return _backend.codegen(this, _closedWorld);
   }
 }
+
+/// Task for building SSA from kernel IR loaded from .dill.
+class KernelSsaBuilderTask extends CompilerTask implements SsaBuilderTask {
+  final Compiler _compiler;
+
+  KernelSsaBuilderTask(this._compiler) : super(_compiler.measurer);
+
+  KernelToElementMap get _elementMap {
+    KernelFrontEndStrategy frontEndStrategy = _compiler.frontEndStrategy;
+    return frontEndStrategy.elementMap;
+  }
+
+  @override
+  HGraph build(CodegenWorkItem work, ClosedWorld closedWorld) {
+    KernelSsaBuilder builder = new KernelSsaBuilder(
+        work.element,
+        _compiler,
+        _elementMap,
+        closedWorld,
+        work.registry,
+        const SourceInformationBuilder(),
+        null);
+    return builder.build();
+  }
+}